<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>

<body>
    <div id="app">
        <div>
            <span>姓名:</span>
            <input type="text" v-model.trim="name" />
        </div>
        <div>
            <span>年龄:</span>
            <input type="number" v-model.trim.number="age" />
        </div>
        <div>
            <span>性别:</span>
            <select v-model="gender">
                <option value="男">男</option>
                <option value="女">女</option>
            </select>
        </div>
        <div>
            <button @click="changeList()">添加/修改</button>
        </div>
        <div>
            <table border="1" cellpadding="10" cellspacing="0">
                <tr>
                    <th>序号</th>
                    <th>姓名</th>
                    <th>年龄</th>
                    <th>性别</th>
                    <th>操作</th>
                </tr>
                <tr v-for="(v,index) of infoList" :key="index">
                    <td>{{ index + 1 }}</td>
                    <td>{{ v.name }}</td>
                    <td>{{ v.age }}</td>
                    <td>{{ v.gender }}</td>
                    <td>
                        <button @click="del(index)">删除</button>
                        <button @click="change(index)">编辑</button>
                    </td>
                </tr>
            </table>
        </div>
    </div>
    <script src="./vue.js"></script>
    <script>
        const app = new Vue({
            el: '#app',
            data: {
                name: '',
                age: '',
                gender: '男',
                changeIndex: '',
                flag: false,
                infoList: [
                    { name: '景元', age: 650, gender: '男' },
                    { name: '停云', age: 300, gender: '女' },
                ]
            },
            methods: {
                changeList() {
                    if (!this.name || !this.age) return alert('姓名或年龄不能为空')
                    if (this.flag) {
                        const info = this.infoList.find((item, index) => index === this.changeIndex)
                        info.name = this.name
                        info.age = this.age
                        info.gender = this.gender
                        this.flag = false
                    } else {
                        this.infoList.push({
                            name: this.name,
                            age: this.age,
                            gender: this.gender
                        })
                    }
                    this.name = this.age = ''
                },

                del(i) {
                    this.infoList = this.infoList.filter((item, index) => index !== i)
                },

                change(i) {
                    const info = this.infoList.find((item, index) => index === i)
                    this.changeIndex = i
                    this.name = info.name
                    this.age = info.age
                    this.gender = info.gender
                    this.flag = true
                }
            }
        })
    </script>
</body>

</html>